If it is a local businesses it can give you some information. 5 stars based on 1 review? Don’t trust it. 4.9 stars based on 100 reviews, split between 25 1-star and 75 5-star reviews? Don’t trust it. But 2 businesses with believable amount of reviews one has 4.3 and other 4.7 stars? I’ll definitely check out the 4.7 one first.